Hi Angela,
I know nothing of the Ohio area so my reply is pretty much of a general nature.
The very first question I would ask is "Is a straw bale house allowed?" If they say yes, get it in writing. You mention a HOA. HOA's are pretty notorious for placing restrictions on properties - sometimes arbitrarily.
If the property is in a HOA, get a full, written list of their rules and go over them with a fine tooth comb BEFORE you commit to buy. My personal rules regarding a property I am considering (again, this in my personal rule):
if it is in a Home Owners Association or has covenants and restrictions on it, I skip the property altogether. I don't even look at it. Each person has to decide what they are willing to put up with though.
Regarding straw bale houses: How much research have you done on straw bale construction? Have you talked to people first hand (not just watching Youtube videos or read websites) who have built and lived in their own straw bale houses? It is a good idea to do so. Straw bale construction can be very inexpensive and very good construction. The opposite can also be true. It can get very expensive. It can turn out to be less than the dream house some have imagined they would. But done well and properly, straw bale houses can be fantastic. I guess what I am saying here is, "Do every step of research carefully before you commit to any one construction method".
Hope something here helps. But then the information I am giving you here is worth exactly what I am charging for it - "nothing"

But I do hope it gives you some help.
Thanks
Homestead Kids